Comparison of Transthoracic Echocardiography Using Second Harmonic Imaging, Transcranial Doppler and Transesophageal Echocardiography for the Detection of Patent Foramen ovale in Stroke Patients
Eur J Echocardiogr 7:147-154, Souteyrand,G.,et al, 2006
Detection of Patent Foramen Ovale. Transesophageal Echocardiography and Transcranial Doppler Sonography With Ultrasound Contrast Media are "Supplementary, Not Competing, Diagnostic Methods"
Med Klin 94:367-370, Heckmann,J.G.,et al, 1999